Liquid aeration method and pump apparatus with stationary vanes and downward flow
AssigneeErnest J. Martin
InventorsErnest J. Martin, Arvid A. Molitor
Life of this patent
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Abstract
Between the vertical tube walls and the blades of the rotating impeller are four vanes attached to the tube walls. In the area radially about the impeller, the vanes are pitched in a direction opposite to the pitch of the impeller blades. The impeller is rotated in a direction such as to force the water downwardly. The top of the tube is below the normal surface of the water and the vanes are inclined from the top to the bottom of the tube. The impeller is rotated at a speed sufficient to produce a vortex from the top of the tube to approximately the top of the impeller.
Claims8
In a pump for use in aerating or cooling a body of liquid such as water having a normal surface level, said pump being of the type having rotationally stationary tube means about a vertical axis, a device connected to the tube means to support the tube means in the liquid with the bottom of the tube means below the normal surface level, power drive means, impeller means connected to said drive means and positioned below said normal surface level, said impeller means having blades pitched in a predetermined direction, and vane means within said tube means and affixed thereto, at least part of said vane means being pitched in the opposite of said predetermined direction, said vane means defining a central opening, said impeller means being positioned within said central opening, the improvement comprising:
- the tube means having a top below said normal surface level, and
- said power drive means rotating said impeller means in a direction such as to force the liquid downwardly in the tube means.
In a pump for aerating a body of liquid such as water having a normal surface level, said pump being of the type having rotationally stationary tube means about a vertical axis, a device connected to the tube means to support it in the liquid with the bottom of the tube means below the normal surface level, power drive means, and impeller means connected to the power drive means and positioned below the normal surface level, said impeller means being rotated by the power drive means to move the liquid axially in the tube means, the improvement comprising:
- the top of said tube means being below said normal surface level a given distance,
- the top of said impeller means being below the top of the tube means,
- said power means rotating said impeller means in a direction such that the axial movement of the liquid is downwardly with the impeller means rotating at sufficient speed that a vortex extends from said normal surface level approximately to the top of said impeller means, and
- including vane means within said tube means and affixed thereto, part of said vane means being radially adjacent the impeller means and being pitched in a direction opposite to the pitch of the blades on the impeller means.
Dependencies are inferred from the claim text.